Double-acting internal-combustion engine



B"- DOUBLE ACTING INTERNAL COMBUSTION ENGHQE.

@- ERNIE.

APPLICATION nu zn ma. 1. 1920.

Patented Sept. 19, 1922.

vim/WM Jm65 Bram meg Patented Sept. 19, i922.

U HTE E Si t- A li ES JAMES BROWN PRICE,

meats M at D or cross KEYS, ENGLAND, assrenos or ONE-"HALF T0 LUTLEIER sinvnarnoann, or nnwron'r, ENGLAND.

DOUBLE-ACTING rn'rnanat-oomnus'rion anemia.

Application filed February 7, 1920. Serial No. 356,959.

ToaZZ whom it may concern:

Be it known that 1, James BROWN PRICE, a subject of the King of Great Britain andv Ireland, and a resident of Cross Keys, county of Monmouth, England, have invented a certain new and useful Improvement in Double Acting Internal Combustion Engines, of which the following is a specification.

This invention relates to an improvement in internal combustion engines.

More particularly the invention relates to double acting internal combustion engines of the type wherein thecharge'is admitted into and given 'a preliminary compression in one chamber, and then transferred into a-sec- 0nd chamber whereit-replaces the exhaust gases therein, and is compressed and fired. That is to say the invention relates to engines of the character set forth comprising a fixed piston secured within'the working cylinder, and a hollow working piston arranged to surround the fixed-piston and located between the same and the inner wall of the working cylinder in such a'manner that it may freely reciprocate with reference to the fixed piston. I

One of the objects of the invention is to provide a more powerful and less complicated engine of the type set forth, thereby particularly adapting it for use on motor cars, motorcycles, airplanes and the like.

Figures 1 and 2 are vertical sectional views,

taken at right angles to each other".

Similar reference numerals designate corresponding parts throughout the several figures of the drawings.

In a double acting engine constructed in accordance with this invention two working chambers are employed constituted by a fixed 7 piston arranged centrally in the cylinder, and each chamber is provided with a piston, said piston being operatively connected by a suitably perforated cylindrical wall, and each serving to highly compress a charge of fuel and transfer such initially highly compressed charge from one side of the piston in one chamber to the other side of the piston in same chamber Where it is further highly compressed and fired.

Referring to Figures 1 and 2, the working pistons 10, 11 are constituted by the ends of a hollow piston: 1 reciprocating within the cylinder 2 and connected by means of a sleeve piston rod 3 with a crosshead 4 that is coupled by a pair of connectingrods 5 with the cranks 6 of the crank shaft 7. Within the hollow piston 11 is the fixed piston 8 on arod 9 on which runs the sleeve 3 and. which is carried by a bracket B bolted to the engine framework. The further essential parts-are indicated in the following description of the action of the engine.

The upper working piston 10 commences its down stroke, the lower one 11 drawing away from the fixed piston 8 thus creating a partialvaouum between itself and the fixed piston. This causes gas to be drawn through the lower-valve 14- and the holes 17 in the wall of the double piston until the lower piston reaches the bottom of its stroke when said valve 1.4 closes. The lower part-12 of the valve box, the inlet ports and thespace between the lowerpiston lland the'fixed piston 8 are now fullof: gas and the up, stroke commences compressing this gas until the bottom edge of the lower piston 11 reaches the lower edge of the port 12 inside the lower valve 141-, when gas is transferred through the holes 17 in the piston wall then through said inlet port 12 and thus into the lower combustion chamber where it may be suitably deflected from the exhaust ports 18,

vwhile the exhaust gases are driven through the latter. A deflector 13is shown on the piston. While this is taking place the space between the upper piston 10 and the fixed piston 8 has filled with gas in a similar manner to the lower space on the down stroke. On the next down stroke the gas is compressed and fired in the usual manner in the lower combustion chamber, the upstroke doing the same for the top combustion chamber. The exhaust is similar to two strokes practice. I

I claim l. A double-acting internal combustion engine of the class described including a main cylinder, a fixed piston therein, a reciprocating double piston having the side Wall thereof perforated for transferring a compressed charge from one side of one of the pistons to the opposite side, the said compressed charge being passed into the Work-l I ing chamber of the same portion ofthe main cylinder Where initial compression occurred, 2. A double-acting internal combustion engine of the class described including a main cylinder, a fixed piston, fuel inlet valves arranged at opposite sides of the fixed piston, a hollow Working piston presenting opposite piston heads and Working over the fixed: pistonand providing interior initial compression chambers, alternately at each side of the latter, saidworking piston having perforations in its side Wall toallow of admissionof fuel from one of the inlet valves into one of the initial compression chambersduring the admission stroke of the piston and whereby upon: the admission stroke of the opposite piston head the charge contained Within the initial vcompression chamber of the hollow piston 'Wlll be forced-therefrom through the perforations into the adjacent Working chamber of the main cylinder." 7

3 A Ldoubleeacting internal. combustion engine of the class described including amain cylinder, having paired inlet and exhaust ports arranged centrally thereof, a

fixed'piston arranged between the paired inlet and. exhaust ports, a'hollow Working piston slidable in the main cylinder and adapted to alternately coveranduncover the exhaust portsand having perforations arranged on the side adjacent the inlet ports whereby upon the movement of the hollow Working piston in opposite directionsfuel will be drawn alternately into the space between the endsfof the hollow piston and the op-' posite sides of the fixed piston and then al ternately compressed upon 'theifclosing of the inlet ports into the Working "chambers of the "main cylindeix I n 4;. An internal" combustion engine, including a cylinder havingintake and exhaust e ports, a. standardsupported in the crank case of the'engin'e' and projecting into the cylinder, aipiston carried by the end of the standard and arranged in a fixed position between the intake and exhaust-ports, 811101" low' piston having perforations in its'side vvall and adapted to operate betweentheqpee riphery of-the said'fixed piston and the-in: terior-of the'cylinder, said hollow pistonhavin closed end Walls, a'sleeve carried by one of-said end Walls and 'slidably mounted on said standard, and crank connections Withone end of said sleeve.

5.' ,An internal combustion engine includ ing a cylinder, a standard arrangedaiiially of the cylinder and projecting externally thereof, means for rigidly securing the end of the standard projecting externally of the cylinder to thecrank case, a stationarypiston headarrangedfat-the intermediate part of said cylinder, and. a; holloW pisto-n' JAMEs BROWN men. 

